ข้อยุ่น ส., ภู่ทวี ว., and ศรีสร้อย อ. “Effect of Post-Operative Recovery Program With the Use of Easy Walk Equipment to Prevent Complications in Abdominal Surgery Patients”. Srinagarind Medical Journal, vol. 34, no. 4, July 2019, pp. 386-92, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/200771.